Signal-lamp.



E. E). SZPER. SIGML LMP APPLIUATIE FILED JULY l5, 1913.

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FURMAN 1D. SPEAR, OF NEW YBRK, El. A

SSIGNOR TD RJSPER MNUFCTURING si nennen?.

Application iler?. July 15. 191.3. Serial No. 27753.24.

To ali 'ui/0m w may concern:

Be it known that i, Eemian U. Sienna., a citizen of the United States,residing at New York, in the county of New 'forli and State of New York,have invented a nevi and useful Improvement in Signaldiamps, of whichthe following is a specication.

This invention lrelates to signal lamps which are used mainly inrailroad service, for instance, as classification lamps on locomotives,as marker lamps at the rear end trains, on semaphores and on switchstands. The conditions under which signal lamps are used for these andother purposes and the requirements which such lamps should uses it isdesirable that the lamp should have a lens which has a field orhorizontal spread of considerable Width, while for other uses a lens isdesirable which concentrates the light in a beam and has a correspondinglong range. For still other uses it is desirable that the lamp shouldhave both styles of lenses, one which has a Wide, fanlike field orSpread and one which concentrates the light in a beam, as for instanceon a switch stand Where a beeui or light is required for a straight main'track and a wide. fan-like illuminated zone which covers one or morecurved tracks joining the main track. t

The object of this invention is to producev a signal" lamp in which theflame chamber is composed of removable and interchantrew abletransparent lens sections and opaque sections or panels, arrangedcircumferentially side by side, the transparent lens sections beingconstructed to spread the light and one or more of the Opaque panels orsections being' provided with a lens which concentrates the light in abeam.

ln the accompanying drawings: Figure 1 is a sectional elevation of asignal lamp provided with these improvements. 2' is a horizontal sectionon line 2-2, Fig. 1. Showing the lamp provided with tivo lens sectionsand tivo opaque sections. one of the opaque sections being; providedwith a circular lens. Fig. 3 is a perspective view of one of the lenssections. Fig. 1i is a perspective view of the opaque section providedwith a circular lens. Fig. is a horizontal section similar to Fig. 2,showing a lamp provided with one transparent section and three opaquesections.

Speeieetion of etters Patent.

which Patented dniy 14, 1914.

rihe frame of the lamp may be of ein,r suitable construction, forinstance it may he constructed shown in the drawings or as shown in theapplication of Furman D. Spear, led September 1S, 1912., Serial No.721.077, or in the application of Judson S. Finley, tiled .September 18,1912, Serial No. 721,059.

.As shown in the f lraivings, the lamp fraaie comprises a base 10,upright bars 11 are secured at. their lower ends to the base, a breast12 which is detachablv Secured to the upper ends of the bars by screws1S entering tianges 14 on the bars, and a top 15 hinged to the breast.

The Haine chamber, as shown in Fig. 2. is composed of four sect-ions,two transparent lens sections 16, 16, and two opaque sections l?, 18,all of the same size and configuration so that these sections areinterchangeable. The i'our sections together form a splicroidal flamechamber having its axis arranged vertier-.ily1 and having fiat ends.Each section has its side edges arranged in radial planes and'each lenssection is constructed above and below its equatorial zone withhorizontal refracting rings which project the rays of light in a anflikeor spreading field or The opaque section 17 is provided With a circularlens 19 which is secured in a `goggle or collar surrounding an opening,rin the section. This lens is arranged in the proper reiation to 'theiiame and of proper construction to concentrate the light in a beamwhich issues from the lanipdat right angles to the vertical axisthereof. t'

The transparent lens sections 16 are .provided with horizontalrefracting ribs arranged preferably on the inner side of the sections orare otherwise so constructed as to spread the horizontally in a fan-likeor diverging TWhen each lens section extends over one-fourth of thecircumference of the flame. chamber, the field or spread of the lightemitted bv one lens section is practically'equal to 9G degrees. Theselens sections and opaque sections form together a circular dame chamberwhich is preferably of spheroidal form, as shown, the same havingrhorizontal upper and lower circular ends and increasing in diameterlfrom each end toward the middle.

The individual lens sections may be of the same color or of difierentcolors and their number may be greater or less according to -or lessthan four.

circumstances, for instance there may be one, two or three lens sectionsand a corresponding number of opaque sections if the ame chamber iscomposed of four sections. The total number of sections may, however, begreater The adjacent side faces of the sections are so constructed as toform joints which are practically Water and air proof in order toprevent disturbance of the imnc under the Severe conditions under whichsignal lamps are used. For this purpose the adjoining la't sides of thesections are 'preferably each provided with a Igroove 21 which extendsfrom end to end of the section and in which a packing strip 22 ofasbestos or other suitable material is arranged.

The base of the lamp is provided with circular seat for the sections ofthe 'flame chamber and this seat is preferably provided with -a rubbergasket 23 on Which the secm tions rest. The upper ends of the sectionsmay be tied together by a rubber gasket 24;. The breast 12 bears uponthe gasket Qf and .holds the sections firmly in position.

pose, thusenabling the same kind of 25 repr nts the oil pot and 26 theburner, which paf may be of ang suitable construction and supported onthe base of the lamp in any suitable manner.

.fis the lens sections and opaque section are alike in size andconfiguration they are interchangeable and a flame chamber of tbedesiredcharacter can be readily formed by selecting and combining theparticular i s Vofsections which are necessary for the pun frame to beutilized for lamps having vari- ;ous combinations of sections.

` I claim as my invention:

.1. A signal lamp comprising a lens having the forniL of a spheroidalsection. with its4 sides Varranged in radial planes, the section beingconstructed above and below its equatorial zone witn lrefracting; ringsarranged circuinferentially and adapted toV project the rays of lign ina fan-like area'.

2. In a signal lamp, the combination with A a lamp frame, of aspheroidal anie chamberremovably secured thereinand composed ofinterchangeable transparent andv opaque able sections arrangedcircumferentally side provided with a circular lens. p

5. The combination Wlth a' lamp frame, or a lame chamber comprisinginterchangeable bv7 side one of which sections is o a ue and.

l i i transparent and opaque sections arranged circu,inferentiallj,7side by side, one of which opaque sections is lens. a

6. The combination With'a lamp 'frame having a base and a movable topportion, of a removable sectional flame chamber arranged between saidbase and top portion andcomp'rising an opaque section having a circularlens,

'Witness my baud, this 7th day of July, 15H3.

FURMAN D. SPEAK.

W'it ieseos provided with a circular i

